Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 40 · 40 questions

What you do (Find the experiment, use the idea): 1. Read the question and find its experiment. 2. Use that experiment’s idea — density, dissolving, capillary action, light bending, air pressure, push-back, air resistance or condensation. 3. For a fair-test question, find what is changed, kept the same and measured. 4. For a safety question, choose what keeps everyone safe.

1. 1.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) distance it travels (b) the slope of the string (c) how big we blow it (d) the same tape
2. 2.☀️ What is white sunlight really made of? (a) many colours mixed (b) only yellow light (c) tiny drops of water (d) tiny bits of dust
3. 3.💧 Which change is this: butter going runny? (a) melting (b) freezing (c) evaporation (d) condensation
4. 4.True or false: sawdust does not dissolve in water. (a) False (b) True
5. 5.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the amount of colour”? (a) we keep it the same (b) we change it (c) we measure it
6. 6.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) it sinks at once (b) colour climbs up it (c) it turns to plastic (d) nothing ever happens
7. 7.🧺 Which of these is not needed for the balloon rocket? (a) sticky tape (b) vinegar (c) a long string (d) a drinking straw
8. 8.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: distance it travels is what we measure. (a) True (b) False
9. 9.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a sunny window (c) a sheet of white paper (d) a balloon
10. 10.True or false: a glass of water is needed for the card-on-a-glass trick. (a) True (b) False
11. 11.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a big bowl (b) sunlight (c) a mirror (d) ice cubes
12. 12.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) food colour (b) a few hours of waiting (c) a glass of water (d) a magnet
13. 13.🍯 Which of these is denser than water? (a) cooking oil (b) a glass marble (c) air (d) a cork
14. 14.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the shape of the clay”? (a) we change it (b) we measure it (c) we keep it the same
15. 15.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it turns blue (b) it floats higher (c) it melts (d) it sinks
16. 16.🧺 Which of these is needed for the coloured flower experiment? (a) a battery cell (b) a magnet (c) a glass of water (d) a balloon
17. 17.🔍 Which is the odd one out? (a) a magnetic chess set (b) a suction hook (c) a bicycle pump (d) a vacuum cleaner
18. 18.🚁 Dropped from a raised hand, does a coin fall slowly or fast? (a) falls slowly (b) falls fast
19. 19.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) glue on the card (c) air pushing up (d) the cold water
20. 20.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) yeast (b) sticky tape (c) a balloon (d) two chairs
21. 21.🔍 Which is the odd one out? (a) snow turning to water (b) butter going runny (c) ice becoming water (d) a misty bathroom mirror
22. 22.🧺 Do we need a magnet for the paper helicopter? (a) not needed (b) needed
23. 23.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? What do we do with “the same three liquids”? (a) we keep it the same (b) we measure it (c) we change it
24. 24.🔍 What do you see a day after a white flower stands in blue water? (a) the petals turn bluish (b) the water turns green (c) the stem turns to ice (d) the flower floats away
25. 25.🥄 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
26. 26.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same card”? (a) we measure it (b) we keep it the same (c) we change it
27. 27.🎈 Why does the balloon rocket move along the string? (a) the straw is heavy (b) escaping air pushes it (c) the string pulls it (d) a magnet pulls it
28. 28.🥄 Does sugar in warm water dissolve faster or slower? (a) slower (b) faster
29. 29.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a sink or a bucket (c) a stiff postcard (d) a magnet
30. 30.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the amount of water”? (a) we keep it the same (b) we change it (c) we measure it
31. 31.🧺 Do we need yeast for the float-or-sink test? (a) needed (b) not needed
32. 32.🛟 Why should you not over-blow the balloon? (a) it gets too heavy (b) it changes colour (c) it can pop loudly (d) it turns into a kite
33. 33.True or false: ice cubes is needed for the water cycle bowl. (a) False (b) True
34. 34.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “whether the card stays”? (a) we change it (b) we measure it (c) we keep it the same
35. 35.🛟 Which rule keeps you safe when working with sunlight? (a) look at it in a mirror (b) look at it through glass (c) stare at the Sun (d) never look at the Sun
36. 36.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) balloons (b) prisms (c) magnets (d) clouds
37. 37.🧺 Do we need a battery cell for the float-or-sink test? (a) needed (b) not needed
38. 38.🔍 Which is the odd one out? (a) a paper towel (b) a glass marble (c) a piece of chalk (d) a flower stem
39. 39.🛟 Why should only a grown-up handle any hot water? (a) it changes colour (b) hot water can scald (c) hot water is heavy (d) hot water is magnetic
40. 40.🧺 Do we need a spoon for the density tower? (a) not needed (b) needed

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